Cause
If you are using a computer with a firewall set up, when you start the transfer tool, a message may display saying the transfer is blocked by the Windows firewall, or the firewall may restrict the transfer.
Solution
You can continue the transfer process by canceling the blocking. However, if you transfer data to two or more display units, you need to select [PASV] for [Communication Port Settings] in the [Transfer Settings] dialog box, or disable the firewall feature.